S
M
T
W
T
F
S
30
51°
44°
31
48°
41°
1
52°
43°
2
53°
46°
3
53°
50°
4
53°
50°
5
53°
48°
6
55°
46°
7
54°
45°
8
53°
48°
9
53°
49°
10
53°
49°
11
53°
47°
12
51°
43°
13
54°
41°
14
53°
45°
15
51°
48°
16
51°
46°
17
55°
44°
18
53°
40°
19
43°
35°
20
43°
34°
21
45°
38°
22
46°
39°
23
48°
40°
24
50°
36°
25
49°
34°
26
48°
34°
27
43°
35°
28
45°
32°
29
43°
31°
30
40°
32°
1
45°
37°
2
43°
34°
3
42°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mertarvik
Mertarvik's September 2026 forecast shows daily high temperatures ranging from 40° to 55°, with overnight lows between 31° and 44°. The average high for September is 46° with an average low of 36°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Mertarvik. See also: October | November | December.
